package y.q.h.util.apicontroller;

import javax.servlet.http.HttpServletRequest;

/**
 * @description:用于获取用户ip
 * @author: yifan
 * @date: 2022-01-24 15:37
 */
public class IPUtil {
    /**
     * 获取(用户端)IP地址
     * @param request
     * @return
     */
    public static String getIpAddr(HttpServletRequest request) {
        try {
            String ip = request.getHeader("x-forwarded-for");
            // System.out.println("x-forwarded-for ip: " + ip);
            if (ip != null && ip.length() != 0 && !"unknown".equalsIgnoreCase(ip)) {
                // 多次反向代理后会有多个ip值，第一个ip才是真实ip
                if(ip.contains(",")){
                    ip = ip.split(",")[0];
                }
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("Proxy-Client-IP");
               // System.out.println("Proxy-Client-IP ip: " + ip);
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("WL-Proxy-Client-IP");
              //  System.out.println("WL-Proxy-Client-IP ip: " + ip);
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_CLIENT_IP");
               // System.out.println("HTTP_CLIENT_IP ip: " + ip);
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("HTTP_X_FORWARDED_FOR");
               // System.out.println("HTTP_X_FORWARDED_FOR ip: " + ip);
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getHeader("X-Real-IP");
               // System.out.println("X-Real-IP ip: " + ip);
            }
            if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
                ip = request.getRemoteAddr();
               // System.out.println("getRemoteAddr ip: " + ip);
            }
            System.out.println("获取客户端ip: " + ip);
            return ip.replace(":",".");
        } catch (Exception e) {
            return "";
        }
    }

}
